1991 LEXUS SC400 engine

16. INSTALL TIMING BELT TENSIONER
(a) Temporarily install the belt tensioner with the 2 bolts.
(b) Alternately tighten the 2 bolts.
Torque: 26 NVm (270 kgf Vcm, 20 ft Vlbf)
(c) Using pliers, remove the 1.27 mm hexagon wrench from the
belt tensioner.
17. CHECK VALVE TIMING
(a) Slowly turn the crankshaft pulley 2 revolutions from TDC to TDC.
NOTICE: Always turn the crankshaft pulley clockwise.
(b) Check that each pulley aligns with the timing marks as shown
in the illustration.
If the timing marks do not align, remove the timing belt and
reinstall it.
18. INSTALL SPARK PLUGS Using a 16 mm plug wrench, install the 8 spark plugs.
Torque: 18 N Vm (180 kgf Vcm, 13 ft Vlbf)
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19. INSTALL DRIVE BELT TENSIONERInstall the belt tensioner with the bolt and 2 nuts.
Torque: 16 N Vm (160 kgf Vcm, 12 ft Vlbf)
HINT: Use bolt 106 mm (4.18 in.) in length.
20. INSTALL GENERATOR
(a) Install the generator and transmission oil cooler pipe bracket with the bolt and nut.
Torque: 37 N Vm (380 kgf Vcm, 27 ft Vlbf)
(b) Connect the generator connector.
(c) Connect the generator wire with the nut and cap.
21. INSTALL RH DISTRIBUTOR HOUSING
Install the distributor housing with the 3 bolts.
Torque: 18 N Vm (185 kgf Vcm, 13 ft Vlbf)
HINT:
w The RH distributor housing is marked with ªRº.
w Each bolt length is indicated in the illustration.
Bolt length:
38 mm (1.50 in.) for A
96 mm (3.78 in.) for B
22. INSTALL LH DISTRIBUTOR HOUSING Install the distributor housing with the 3 bolts.
Torque: 18 N Vm (185 kgf Vcm, 13 ft Vlbf)
HINT:
w The LH distributor housing is marked with ªLº.
w Each bolt length is indicated in the illustration.
Bolt length:
38 mm (1.50 in.) for A
80 mm (3.15 in.) for B
23. INSTALL DISTRIBUTOR ROTORS
(a) Align the protrusion of the distributor rotor with the groove the
camshaft timing pulley.
(b) Install the distributor rotor with the 2 bolts. Install the 2 distributor rotors.
Torque: 3.8 N Vm (39 kgf Vcm, 34 in. Vlbf)
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24. INSTALL DISTRIBUTOR CAPSInstall the distributor cap with the 3 bolts. Install the 2 distribu-
tor caps.
Torque: 3.8 N Vm (39 kgf Vcm, 34 in. Vlbf)
25. INSTALL RH NO.2 TIMING BELT COVER
(a) Install the 4 gaskets to the timing belt cover.
(b) Install the wire grommet to the timing belt cover.
(c) Fit the timing belt cover, matching it with the hydraulic pump.
(d) Fit the timing belt cover holes, matching them with the 2
grommets on the distributor cap.
(e) Install the timing belt cover with the 5 bolts.
Torque:
18 NVm (185 kgf Vcm, 13 ft Vlbf) for 12 mm head
HINT (for 12 mm head): Use bolts 106 mm (4.17 in.) in length.
(f) Install the wire clamp to the timing belt cover.
(g) Install the camshaft position sensor connector to the ignition coil bracket.
26. INSTALL LH NO.2 TIMING BELT COVER
(a) Install the 2 gaskets to the timing belt cover.
(b) Run the camshaft position sensor wire through the timing belt
cover hole.
(c) Fit the timing belt cover, matching it with the hydraulic pump.
(d) Fit the timing belt cover holes, matching them with the 2 grommets on the distributor cap.
(e) Install the timing belt cover and connector bracket with the 3 bolts.
(f) Install the wire grommet to the timing belt cover.
(g) In sta ll th e ca msh a ft po sitio n se n so r c onnector to the
connector bracket.
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27. INSTALL DRIVE BELT IDLER PULLEYInstall the idler pulley and cover plate with the bolt.
Torque: 37 N Vm (380 kgf Vcm, 27 ft Vlbf)
28. INSTALL HIGH±TENSION CORDS, CORD CLAMPS AND
CORD COVER ASSEMBLY
(a) C onnect the high±tension cords to the spark plugs,
distributor caps and RH ignition coil.
(b) Install the lower high±tension cord cover with the bolt.
(c) Connect the RH front high±tension cord clamp to the lower high±tension cord cover.
(d) Place the RH front high±tension cord clamp to the RH rear
high±tension cord clamp.
(e) Install the 2 bolts holding the RH high±tension cord clamps to the RH cylinder head cover.
(f) Connect the No.2 high±tension cord to the cord clamp on the
RH front high±tension cord clamp.
(g) Connect the LH front high±tension cord clamp to the lower high±tension cord cover.
(h) Place the LH front high±tension cord clamp to the LH rear
high±tension cord clamp.
(i) Install the 2 bolts holding the LH high±tension cord clamps to the LH cylinder head cover.
(j) Connect the No.1 high±tension cord to the cord clamp on the
LH front high±tension cord clamp.
29. INSTALL RH NO.3 TIMING BELT COVER
(a) Install the 3 gaskets to the timing belt cover.
(b) Fit the portion A of the timing belt cover, matching it with the lower high±tension cord cover.
(c) Install the timing belt cover with the 4 bolts.
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30. INSTALL VSV FOR EVAP SYSTEMInstall the VSV with the 2 bolts.
31. INSTALL LH NO.3 TIMING BELT COVER
(a) Install the 3 gaskets to the timing belt cover.
(b) Install the cord grommet to the high±tension cord (from the LH ignition coil).
(c) Install the cord grommet to the timing belt cover.
(d) Fit the portion A of the timing belt cover, matching it with the lower high±tension cord cover.
(e) Install the timing belt cover with the 4 bolts.
32. INSTALL RH ENGINE WIRE COVER
(a) Fit portions A and B of the engine wire cover, matching them with the lower high±tension cord cover and No.3 timing belt
cover.
(b) Install the timing belt cover with the bolt.
33. INSTALL LH ENGINE WIRE COVER
(a) Connect portions A and B of the engine wire cover to the wire
brackets.
(b) Set the VSV (for the fuel pressure) wire in original position.
(c) Fit portions C and D of the engine wire cover, matching them with the lower high±tension cord cover and No.3 timing belt
cover.
(d) Install the timing belt cover with the 2 bolts.
34. INSTALL UPPER HIGH±TENSION CORD COVER
(a) Fit portion A of the upper high±tension cord cover matching the top of the lower high±tension cord cover.
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(b) Push the front side of the upper high±tension cord cover, andfit the front side claw groove of the upper high±tension cord
cover to the claw of the lower high ±tension cord cover.
(c) Install the upper high±tension cord cover with the 2 bolts.
35. INSTALL LH IGNITION COIL
(a) Install the ignition coil with the 2 bolts.
(b) Connect the following connectors and cord:
(1) Ignition coil connector
(2) Noise filter connector
(3) High±tension cord
36. INSTALL INTAKE AIR CONNECTOR
(a) Connect the intake air connector to the throttle body.
(b) Install the hose clamp and bolt.
(c) Connect the following hoses: (1) Air hose to IAC valve
(2) Air hose (from air control valve on PS pump) to intake air
connector.
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37. INSTALL AIR CONDITIONING (A/C) COMPRESSOR
(a) Install the A/C compressor, compressor stay and groundcable with the nut and 3 bolts.
Torque:
49 NVm (500 kgf Vcm, 36 ft Vlbf) for bolt
29 N Vm (300 kgf Vcm, 22 ft Vlbf) for nut
(b) Connect the A/C compressor connector.
38. INSTALL RADIATOR ASSEMBLY
(a) Install the 2 lower radiator supports to the radiator.
(b) Place the radiator assembly on the body bracket.
(c) Slightly lift the radiator, and connect the 2 oil cooler hoses (for
cooling fan) to the hose clamp on the radiator fan shroud.
(d) Install the upper radiator support with the 2 bolts and screw. Install the 2 upper radiator supports.
Torque: 12 N Vm (120 kgf Vcm, 9 ft Vlbf)
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(e) Connect the following hoses:(1) 2 oil cooler hoses (for cooling fan) to pipes
(2) 2 radiator hoses
(3) 2 oil cooler hoses (for transmission) to radiator
(4) Suction hose to hydraulic pump
(5) Pressure hose to hydraulic pump
(f) Connect the ECT sensor connector (for cooling fan).
(g) Install the ECT sensor wire clamp to the radiator fan shroud.
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